CVE-2026-111720 fish-island-backend through commit 7c61b78 SSRF via /api/web/parse
Unauthenticated attackers can exploit SSRF in fish-island-backend to access internal services and cloud metadata via the URL parsing endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111720?
CVE-2026-111720 is a medium-severity server-side request forgery vulnerability in lhccong fish-island-backend, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
fish-island-backend through commit 7c61b78 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server fetch attacker-supplied URLs via the url parameter of GET /api/web/parse. Attackers can target internal hosts, loopback services or cloud metadata endpoints through redirect-following OkHttp requests and read back page titles, meta descriptions and favicons.
Weakness: CWE-918
Which versions are affected by CVE-2026-111720?
How do I fix CVE-2026-111720?
No fix has been published for CVE-2026-111720 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-111720 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111720 exists.
Sources
Also known as GHSA-mc35-74mg-3v34.